\begin{tikzpicture}
    \begin{scope}
        \tkzDefPoints{0/0/A, 2/0/B, 1.8/1/C, 0.8/1.5/D}
        \tkzDrawPolygon(A,B,C,D)
        \tkzLabelPoints[above](D)
        \tkzLabelPoints[right](C)
        \tkzLabelPoints[below](A,B)
    \end{scope}

    \begin{scope}[xshift=3cm,scale=1.5]
        \tkzDefPoints{0/0/A', 2/0/B', 1.8/1/C', 0.8/1.5/D'}
        \tkzDrawPolygon(A',B',C',D')
        \tkzLabelPoints[above](D')
        \tkzLabelPoints[right](C')
        \tkzLabelPoints[below](A',B')
    \end{scope}
\end{tikzpicture}

